从Docker中的另一个容器连接到Redis

Question

I have app, that used Tornado and tornado-redis . [image "app" in docker images ] I start redis:

docker run --name some-redis -d redis

Then I want to link my app with redis:

docker run --name some-app --link some-redis:redis app

And I have error:

Traceback (most recent call last):
  File "./app.py", line 41, in <module>
    c.connect()
  File "/usr/local/lib/python3.4/site-packages/tornadoredis/client.py", line 333
, in connect
    self.connection.connect()
  File "/usr/local/lib/python3.4/site-packages/tornadoredis/connection.py", line
 79, in connect
    raise ConnectionError(str(e))
tornadoredis.exceptions.ConnectionError: [Errno 111] Connection refused

I have tested my code with local tornado and redis, and it works. The problem in

c = tornadoredis.Client()
c.connect()

Why my app cant connet to redis-container? How to fix that? I use standart port 6379.

Thanks!

Answer 1

tornadoredis attempts to use redis on localhost . (See source here )

So you need to inform tornadoredis where redis is running (since to the docker image it is not running on localhost ).

For example:

c = tornadoredis.Client(host="<hostname>")
c.connect()

In your specific case, substitute "redis" for "<hostname>" .